During the last week the observing schedule was interrupted by a
high-radiation event that activated the science instrument safing
sequence (SCS 107) and stopped observing at 00:29am EST on Mar 7. All
spacecraft actions were nominal. Real-time procedures were executed on
Mar 7 to disable SCS-29, which was enabled during the safing sequence,
and to update the observation identifier number, to aid CXCDS
processing of the interrupted observation. Observations that were
impacted will be rescheduled.

A flight software patch was uplinked on Mar 2 to update the on-board
gyro calibration misalignment matrix. Real-time procedures were
executed on Mar 3 to dump OBC-A memory as a follow-up to the
patch. The dump will be used to update the baseline memory image
maintained on the ground. A real-time procedure was executed on Mar 7
to perform a routine self-check of the Electrical Interface Assembly
(EIA) Sequencer.

A Chandra press release was issued on Mar 2 as a NASA press release
describing multi-telescope observations of Abell 520, colliding galaxy
clusters. Astronomers used Chandra, Hubble, and the Subaru and
Canada-France-Hawaii telescopes to observe Abell 520, which is 2.4
billion light years away. A clump of dark matter has apparently been
left behind after a violent collision of galaxy clusters. This dark
matter clump contains far fewer galaxies than would be expected if the
dark matter and galaxies hung together. For details see:
http://chandra.si.edu/press/12_releases/press_030212.html

The schedule of targets for the next week is still in development and
subject to the on-going effects of heightened Solar activity.